forked from OSchip/llvm-project
55 lines
1.6 KiB
YAML
55 lines
1.6 KiB
YAML
# RUN: llc %s -o - -run-pass=peephole-opt | FileCheck %s
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# Check that we don't optimize out a subs due to areCFlagsAccessedBetweenInstrs
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# returning the wrong result; it should check the cneg before the subs which does
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# modify cflags.
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# CHECK-LABEL: f
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# CHECK: SUBSWrr
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# CHECK-NEXT: SUBWrr
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# CHECK-NEXT: CSNEGWr
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# CHECK-NEXT: SUBSWri
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# CHECK-NEXT: CSNEGWr
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# CHECK-NEXT: Bcc
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--- |
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target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-w64-windows-gnu"
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define dso_local void @f() {
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ret void
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}
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...
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---
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name: f
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registers:
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- { id: 43, class: gpr32, preferred-register: '' }
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- { id: 44, class: gpr32, preferred-register: '' }
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- { id: 46, class: gpr32, preferred-register: '' }
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- { id: 47, class: gpr32, preferred-register: '' }
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- { id: 48, class: gpr32common, preferred-register: '' }
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- { id: 49, class: gpr32common, preferred-register: '' }
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- { id: 50, class: gpr32, preferred-register: '' }
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- { id: 51, class: gpr32, preferred-register: '' }
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- { id: 52, class: gpr32, preferred-register: '' }
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- { id: 53, class: gpr32, preferred-register: '' }
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body: |
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bb.0:
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successors: %bb.0
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%43 = MOVi32imm 1
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%44 = MOVi32imm 1
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%46 = MOVi32imm 1
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%47 = MOVi32imm 1
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%48 = nsw SUBSWrr killed %43, killed %46, implicit-def dead $nzcv
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%49 = nsw SUBSWrr killed %44, killed %47, implicit-def dead $nzcv
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%50 = SUBSWri %48, 0, 0, implicit-def $nzcv
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%51 = CSNEGWr %48, %48, 5, implicit $nzcv
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%52 = SUBSWri %49, 0, 0, implicit-def $nzcv
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%53 = CSNEGWr %49, %49, 5, implicit $nzcv
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Bcc 1, %bb.0, implicit $nzcv
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RET_ReallyLR
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...
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